The BoT has a HUGE amount of lift - especially when launching (I use a HDhigh-start). When I built my BoT I had the same issue that you do - didn't look like the elevator moved enough. So, I increased the slot for "down" to as much as servo-throw would allow (about 3/4") and have always been glad that I did. That extra little bit helps on launch, but only on launch.

My biggest issue with her was balance - the GP kit is horribly tail-heavy, seemingly no matter how much you sand it, and I had to add a lot of weight to the nose. Also, she was my first bird with spoilers (very VERY necessary) and I made mine too large - 5 bays wide and 1.5" thick. I've since found out that 3 bays is just about right (works well on almost every other BoT I've seen fly). On my website, at www.wanderings-ds.com/whs/52-bot-1.html the top center pic shows mine. If I were to build another, I'd NOT use the inner 3 bays on the wing, just the outer 3 bays, and I think 1" wide is more than enough. As it is, mine are 1.5" and I don't deploy them much more than about 1/3 open. Otherwise, she goes into a rather steep dive (WAYtoo much spoiler). One of my photos shows how little mine are deployed on most landings - www.wanderings-ds.com/images/52images/bird-of-time/100_0426.jpg

She's a great bird to fly - you'll enjoy her a lot. Only "flying" tip I'd give is to watch the turns - she doesn't turn very sharp (lotta wing for the little rudder to move around), and she's kinda slow on rudder response time - starts into them slower than I'd think is "proper". Once you've flown her a few times you learn how she'll maneuver.

Enjoy yours!!!

Dave